Other
Sloan Digital Sky Survey: Sky Map
This astronomical survey by the Sloan Digital Sky Survey is poised to be one of the most ambitious ever undertaken. When completed, it will provide detailed images covering more than a quarter of the sky, and almost a million galaxies...
Texas Instruments
Texas Instruments: Celestial Sphere Study Cards
Multiple choice study cards for reviewing the Celestial Sphere.
Fundación Cientec
Fundacion Cientec: Constelaciones Zodiacales
This site provides detailed history and star cluster location information for each zodiac constellation. Also includes links (mostly to Wikipedia pages) to additional information for keywords that appear in the articles.
Smithsonian Institution
National Museum of American History: The Remarkable Star Map of Simeon De Witt
Simeon de Witt created his star map in 1780 after studying European star maps and the skies. His is the 'oldest surviving Anglo-American star map.' Read about the history of star maps, a biography of Simeon de Witt, and the influence his...
PBS
Star Map
This star map has five different constellations along with four newly discovered solar systems. If you are located in the northern hemisphere you can use this resource to locate stars.